This is WABOT-2, a humanoid robot developed at Waseda University in the early 80’s.

In 1980, our laboratories joined in a joint project again and commenced the WABOT-2 project. Playing a keyboard instrument was set up as an intelligent task that the WABOT-2 aimed to accomplish, since an artistic activity such as playing a keyboard instrument would require human-like intelligence and dexterity. Therefore the WABOT-2 was defined as a “specialist robot” rather than a versatile robot like the WABOT-1. 
The robot musician WABOT-2 can converse with a person, read a normal musical score with is eye and play tunes of average difficulty on an electronic organ. The WABOT-2 is also able of accompanying a person while he listens to the person singing. The WABOT-2 was the first milestone in developing a “personal robot”.

Info from here